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st: does margins command obviate concerns that inteff solves?


From   Doug Hess <douglasrhess@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: does margins command obviate concerns that inteff solves?
Date   Fri, 9 Dec 2011 10:47:41 -0500

Hi.

I have been searching around but couldn't find confirmation that the
-margins- command handles well the concerns about interactions in
logistic regression that led to the user-written command -inteff-.  I
see an article forthcoming in the Health Services Research that might
cover this, but I cannot access it yet (by Pinar Karaca-Mandic, Edward
C. Norton and Bryan Dowd; to find this article, google:  DOI:
10.1111/j.1475-6773.2011.01314.x  ). I have seen some mention that
-margins- might obviate the need for using inteff, but it was not
certain. Finally, there are comments that using relative risk ratios
gets around this, etc., but I am concerned with adjusted predictions
following interactions and using the -margins, contrast - options or
contrast operators after estimating a model with interactions, and I'd
like to make sure that I'm not falling into the trap that Norton, et
al. have mentioned in many articles (

Feel free to cc me on responses at douglasrhess@gmail.com, as I get
the list as a digest and will not see responses quickly (i.e., to be
able to respond or follow up, etc.).

Thank you.

Doug

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